BRUSSELS — President Trump routinely invokes the phrase “fake news” as a rhetorical tool to undermine opponents, rally his political base and attempt to discredit a mainstream American media that is aggressively investigating his presidency.

But he is not the only leader enamored with the phrase. Following Mr. Trump’s instance, several of the world’s autocrats and dictators are taking a shine to it, too.

When Amnesty International released a report about prison deaths in Syria, the Syrian president, Bashar al-Assad, retorted that “we are living in a fake-news era.” President Nicolás Maduro of Venezuela, who is steadily rolling back democracy in his country, blamed the global media for “lots of false versions, lots of lies,” saying “this is what we get in touch with ‘fake news’ today.”

In Myanmar, exactly where international observers accuse the military of conducting a genocidal campaign against the Rohingya Muslims, a security official told The New York Occasions that “there is no such issue as Rohingya,” adding: “It is fake news.” In Russia, a Foreign Ministry spokeswoman, Maria Zakharova, told a CNN reporter to “stop spreading lies and fake news.” Her ministry now uses a massive red stamp, “FAKE,” on its site to label news stories it dislikes.

About the world, authoritarians, populists and other political leaders have seized on the phrase “fake news” — and the legitimacy conferred upon it by an American president — as a tool for attacking their critics and, in some situations, deliberately undermining the institutions of democracy. In nations where press freedom is restricted or under considerable threat — like Russia, China, Turkey, Libya, Poland, Hungary, Thailand, Somalia and other folks — political leaders have invoked “fake news” as justification for beating back media scrutiny.

Just this week, the official newspaper of the Chinese Communist Party, People’s Everyday, utilized Mr. Trump’s words to undercut vital media coverage of an increasingly authoritarian Beijing.

“If the president of the United States claims that his nation’s top media outlets are a stain on America,” the paper wrote, “then unfavorable news about China and other nations need to be taken with a grain of salt, because it is probably that bias and political agendas are distorting the real picture.”

Not really a year into his presidency, Mr. Trump has shaken the global status quo, with his “America First” ethos, his disdain for global trade and multilateral treaties, and his testy relationships with many standard allies (and seemingly warm embrace of several classic rivals). But the president’s mantra of “fake news” stirs distinct issues among a lot of foreign politicians and analysts, who worry it erodes public self-confidence in democratic institutions at a time when populism and authoritarianism are returning in several regions.

“Trump does not only speak about fake news, but attacks the media as fake news, and that is an attack on the free press,” mentioned Marietje Schaake, a Dutch member of the European Parliament who focuses on human rights and the digital landscape. “As the leader of a country that traditionally defends human rights, that is quite significant, and of course it has a key impact worldwide.”

Richard Javad Heydarian, a political scientist at De La Salle University in Manila and the author of a book on President Rodrigo Duterte of the Philippines, mentioned that American soft power, extended rooted in advocacy of democracy, was “in a state of total collapse,” enabling strongman leaders like Mr. Duterte higher leeway to ignore democratic norms.

“With Trump in power, no one is speaking about human rights, only fake news, and that is wonderful for Duterte,” he stated. “They each see themselves as populists facing a conspiracy of liberal elites. They think they are victims of fake news.”

Even though the term “fake news” has been about at least given that the 1890s, according to Merriam-Webster, Mr. Trump is most accountable for producing it a large element of the present worldwide conversation. Now it is so widespread that Collins Dictionary decided to make it this year’s “word of the year,” locating in early November that the use of the term had risen by 365 % since 2016.

Helen Newstead, Collins’s head of language content material, said that “ ‘Fake news,’ either as a statement of reality or as an accusation, has been inescapable this year, contributing to the undermining of society’s trust in news reporting.”

The issue, of course, is that fake news is a genuine dilemma, specially on social media. United States intelligence agencies have concluded that Russia utilized fake news reports as part of an effort to interfere in the 2016 presidential election on behalf of Mr. Trump. The presence of fake news in the globalized stream of media content aids blur the line with traditional, reality-based news.

How much the fake-news epithet has broken journalism, nevertheless, is hard to say, provided the pre-current difficulties of performing untrammeled reporting in nations exactly where the media is currently beneath the thumb of the state and where journalists have been murdered or imprisoned, not merely insulted or mocked. But there is little question that social media, with its massive reach and its vulnerability to bots and manipulation, has helped to amplify criticism from political leaders and undermine trust in classic journalism.

“Trump has succeeded in constructing an option reality separate from the mainstream media’s efforts at democratic, rational politics,” stated John Lloyd, a senior investigation fellow at the Reuters Institute for the Study of Journalism at the University of Oxford. “Of course journalists make blunders, but those errors are amplified by the charge of ‘fake news,’ ” he mentioned. “The mainstream media is portrayed as the tool of an arrogant, out-of-touch elite, who use that tool to preserve down the marginalized.”

The fake-news narrative also complicates the perform of democracy advocates in nations where democracy is currently below assault. Kenneth Roth, the executive director of Human Rights Watch, mentioned that “the sad irony is that Trump’s greatest harm to human rights might not be his infatuation with abusive strongmen but his undermining of the truth-based discourse that is vital for reining them in.”

He added: “In nations where the judicial method is unable or unwilling to enforce rights — most countries — the human rights movement’s major tool is to investigate and publicize official misconduct. Autocrats go to great lengths to avoid that shaming, due to the fact it tends to delegitimize them ahead of their public and their peers.”

Some analysts say Mr. Trump’s accomplishment at creating an option reality and disparaging an adversarial media each copies and augments the techniques of Russia’s president, Vladimir V. Putin, noting that Mr. Putin’s propagandists “create a barrage of fake facts” on politically sensitive subjects such as the conflict in Ukraine in order to sow public cynicism and uncertainty. Russia and China also create “positive” fake news on social media to inspire patriotism at home.

“People accept these versions or are confused by them, unclear as to what is correct,” mentioned Mr. Lloyd, author of “The Energy and the Story: The Worldwide Battle for News and Info.” “Putin above all has grasped this and uses it against his enemies. The notion of ‘fake news’ is utilised to tar any uncomfortable reality.”

Other governments have also embraced the phrase, specifically to attack media outlets that Mr. Trump constantly disparages. One glaring instance came in Libya, right after CNN aired video displaying a migrant getting auctioned as a slave. Libyan leaders responded by employing Mr. Trump’s attacks against CNN to try to cast doubt on the network’s report.

Prime Minister Hun Sen of Cambodia, who was put in charge of the occupied nation by the Vietnamese Army far more than 30 years ago, shut down The Cambodia Every day and jailed journalists and recently banned the opposition party. Now he also has focused his attacks on Western media for writing about issues from corruption and repression to sex trafficking. “I would like to send a message to the president that your attack on CNN is correct,” Mr. Hun Sen mentioned in August. “American media is really undesirable.”

Prime Minister Najib Razak of Malaysia, embroiled in a scandal in which billions of dollars disappeared from the state investment fund, repeatedly calls accusations against him “fake news,” such as what he named “a well-recognized foreign newspaper,” presumably a reference to The Wall Street Journal, which has reported on the disappearance of the funds. Mr. Trump after named Mr. Najib his “favorite prime minister.” He also has hailed his “great relationship” with Mr. Duterte, the Philippine president, who has blamed “fake news” for coverage of his war on drug traffickers, which has killed thousands of Filipinos, a lot of with no trial.

Numerous media organizations are now introducing features to verify information for readers. In France, Le Monde’s Décodex was launched in January as part of the truth-checking section of its website. In Britain, the BBC is beginning a project to assist secondary college pupils to identify true news and filter out fake or false information.

But it is a various matter when the president of the United States is the supply, Ms. Schaake said. “There is significant harm to the credibility of the United States as the defender of human rights and democratic principles, of which press freedom is 1 of the pillars,” she said.